5396713-BIM-C-0319
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Johnson Controls Ducted Systems
SECTION V: THERMOSTAT
INSTALLATION
The adjustable heat anticipator in the thermostat is pre-set at 0.4 amps.
This setting should be checked at the time of installation.
In some cases the thermostat may be a “self-setting” type in which case
no amp setting is on the thermostat, eliminating the need for any field
adjustment.
Thermostat should be located on an inside wall in an open area to more
closely regulate average room air, preferably, where there is air move-
ment back to furnace. Care should be used to locate thermostat away
from hot air discharge openings, lights, etc. Locating height of thermo-
stat is important. Thermostat should be located 52” to 66” (132 - 167.6
cm) above the floor. This is sometimes called the comfort zone.
If a condenser with its own Transformer shares a Heat/Cool Thermostat
with this furnace, use a thermostat with isolating contacts to prevent
interconnection of Class II 24 Volt Systems.
Cycle furnace using the thermostat to make sure it operates correctly.
Maintenance and operating instructions are in the customer envelope
accompanying the furnace. Give the customer envelope to the home
owner.
SECTION VI: OPTIONAL AIR
CONDITIONING ACCESSORIES
EBE Furnace Models
The EBE furnace is already equipped with a blower and control system
for add-on air conditioning and heat pump. The coil shelf kit (3500-8981
for downflow coils up to 5 ton and 3500-8602 extension cabinet for any
coils taller than 19-1/2”) must be installed when adding on remote air
conditioning systems. With the 3500-8981 coil shelf installed in the EBE
model, the coil cavity accepts coils no taller than 19-1/2”, no wider than
18-1/4” and no deeper than 20-1/2”.
EUE Furnace Models
No extension cabinet and coil shelf are needed for the EUE upflow fur-
nace. The coil shelf is already installed in the EUE models. Like the
above furnace models, the coil cavity accepts coils no taller than 19-1/2”, no
wider than 18-1/4” and no deeper than 20-1/2”.
HIGH PERFORMANCE BLOWER
ACCESSORY PACKAGE
All electric furnaces are equipped with a blower and control system to
add-on air conditioning and heat pumps to specified sizes. If the
requirement is to achieve more air flow or cooling than specified, then
the blower inside the furnace has to be replaced with an accessory
blower package 3500-7901/*. This accessory blower package would
deliver air conditioning up to 5-tons.
CAUTION
When using separate thermostats, a thermostat interlock system
must be provided to prevent simultaneous operation of the furnace
and air conditioner. Simultaneous operation can result in coach
overheating, equipment damage and energy waste. (See Figures
13 through 18.)
Do not connect Yellow wire to thermostat until an outdoor unit is
installed.
FIGURE 12:
Thermostat Wiring
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COOLING
THERMOSTAT
HEATING
THERMOSTAT
TO
AIR CONDITIONER
TO
FURNACE
DOUBLE POLE
DOUBLE THROW SWITCH
A0876-001
WARNING
Failure to install this insulation and coil shelf kit could result in dam-
age to equipment and/or personal injury. Liability and warranty from
the manufacturer could also be void.
NOTICE
If the controls are located at the top of the unit, the furnace is an
upflow furnace and the airflow is forced up through the furnace and
into the airways.
CAUTION
All areas around the line sets, drain hoses and other openings in
the coil shelf should be sealed air tight. Use some moldable com-
pound or caulking to seal the area. Failure to do so may result in
loss of performance and premature compressor failure.
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